smog test problems

[Pinseekers]

My 86 NA failed twice already the damm smog test.
allowable levels (max) is 946 on the NO part.
the first time i recorded 1104 and the second time was 1309, both well above the maximum allowed.
How can I lower my levels of NO without spending much $$$.
I am required to go through a "smog test only" facility they cannot do repairs or reccomend options!
Can anybody help????
thanks

[Pinseekers]

where would I cheaply purchase this O2 sensor without driving all the way out to el Segundo to Pelican? I need to have this fixed by next week or I have a registration penalty

[SoCal Driver]

Originally posted by Pinseekers
where would I cheaply purchase this O2 sensor without driving all the way out to el Segundo to Pelican? I need to have this fixed by next week or I have a registration penalty

Try your closest Pep Boys or Krangen auto parts. They are in the phone book.

Check the sensor they give you against Wilk's description to insure you get the correct one.

[Tom_C]

Last year I chased the NO problem for 2 months and a $1000.00.
Spent 6 hours on Derecks dyno, changed every sensor, setting, AFM and piping. All we found was the engine ran the same. Also added 4 wire O2 kit. Went to shop who alowed me to use his Gas analyzer. Proved Cat was OK. After getting a peek at the SMOG testers bible I found that for our cars < 3.0 they are to test in second gear if the engine was above 1500 RPM. Mine was at @ 1502, this is too low for our cars, most will fail NO. Added air to rear tires new RPM was 1495 this ment they had to use 1st gear. Car passed with fling colors. By the way the final smog check was at a shop that was owned by an Ex por mech. He already new of this problem (Why didn't dereck?). The first question he asked was what are my rear air pressures at. (Sorry for the spelling errors).


Just my .02

Tom_C
87 BLK 951, DB1, 2002 E46

[Pinseekers]

on both tests the rpms were above 1500
are these guys idiots?
the first one with lower reasdings came after third gear running the second time was in second gear

[Pinseekers]

I have replaced the O2 sensor (Bosh Universal) and went back for a new smog check.
Gross pollutter now!!!!!!
What the hell???
I have an exhaust leak as well, can that be screwing me up??
anybody want to jump in??
I need to pass smog so that I can sell this car. i NEED A TRUCK FOR MY NEW bANSHEEE!!!!!

[Scott R]

Yes exhaust leaks will cause to fail. It will shown excessive entrance of regular O2 into the system.


How does your J-boot look? Remove it and check for cracks on the bottom. It will cause serious emissons issues if it has ANY holes in it.

Now check for leaks in the intake runner selas. Can of carb cleaner is a good test. It will bubble aorund the holes.

I failed worse then you. But it was a simple J-boot leak that was messing up the AFM. Best of luck, you'll find it!